There doesn't seem to be a consensus on this, but the themes seems similar.
Here are some opinions
From the Students for Liberty:
Free markets usually encompass the principles of
- private property
- capitalism
- individual rights.
From the U.S. Department of Agriculture:
Our business system is based upon four basic principles:
(1) freedom of choice
(2) private property rights
(3) profit motive of owners
(4) owner control.
From Investopedia:
The U.S. economic system of free enterprise has five main principles:
- the freedom for individuals to choose businesses,
- the right to private property,
- profits as an incentive,
- competition,
- consumer sovereignty.
From Wikipedia:
Central characteristics of capitalism include
- capital accumulation
- competitive markets
- a price system
- private property and the recognition of property rights
- voluntary exchange
- wage labor.
